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Occupancy Sensor
See Motion Sensor
Occupant Override Switch
Or simply override switch - A control option that allows building occupants to override the Building Automation System lighting or HVAC schedule for a limited period of time.
Occupant Setpoint Adjustment
A control option that allows building occupants to adjust - within limits set by the Building Automation System - the heating, cooling or lighitng setpoints of selected zones. Typically the user interface for this function is built into the zone sensor.
Optimal Start-Up
A control strategy that automatically starts an HVAC system at the latest possible time yet ensures comfort conditions by the time the building becomes occupied.
In a typical implementation, a controller measures the temperature of the zone and the outside air. Then, using design heating or cooling capacity at the design outside air temperature, the system computes how long a unit must run at maximum capacity to bring the zone temperature to its occupied setpoint.
The optimal start algorithm often includes a self-learning feature to adjust for variations from design capacity.
A distributed system must use Run on Request with Optimal Start.Outdoor Lighting
Any hard wired, low-voltage or solar powered lighting system that is used in an exterior space. Outdoor lighting can enhance the beauty of your home, making it safer and more secure. Outdoor lighting typically is an investment that pays off in the value it adds to a home.Override Switch
A control option that allows building occupants to override the programmed HVAC schedule for a limited period of time.
Outlet Box
Also Junction Box or J Box. Enclosure that protects spliced wires and supports surface fixtures.Over Voltage
Incandescent lamps experience shortened lamp life when operated above their rated voltage.
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